(57) This invention provides a stereoscopic display apparatus which can discriminate image
signals for the the image signals for the right and left eyes.
The basic principle of a stereoscopic apparatus according to an embodiment of this
invention will be described below with reference to Figs. 2B and 2C. When the optical
axes 210 and 211 of the photographing lenses are set to be parallel to each other,
the position of the object image 201r in the field frame 212 is near the left end,
and the position of the object image 201ℓ in the field frame 213 is near the right
end. In order to detect a relative positional relationship, in the right-and-left
direction, of the object on the basis of the signal waveforms shown in Fig. 2C, when
the correlation calculation unit 105a performs a correlation calculation between the
signal waveforms 215 and 216, the value τα corresponding to a peak value of the calculation
result Cℓr(τ) is a positive value. On the other hand, when the image signals for the
right and left eyes are input to the wrong sides, since the value τα corresponding
to a peak value is a negative value, whether or not the right and left video signals
are normally input can be discriminated by checking the polarity of the value τα.
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